Pistachio Seed Chalcid, Megastigmus pistaciae Walker (Hymenoptera: Torymidae), in California

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A pistachio seed chalcid, Megastigmus pistaciae Walker, is a pest of pistachios in North Africa and Mediterranean and Middle East countries. It was first discovered in North America in Chico, California, in 1967. Its distribution now includes major portions of the Sacramento and San Joaquin Valleys and limited areas of southern California. Hosts recorded worldwide include eight species of Pistacia and one species of Shinus. Nut and sticky trap collections indicate two primary flight periods per year.

Document Type: Research Article

Publication date: October 1, 1988

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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